MATLAB Answers

Find first index that exceeds condition

27 views (last 30 days)
Jonathan Cheong
Jonathan Cheong on 25 Feb 2021
Commented: Jonathan Cheong on 25 Feb 2021
To elaborate and ensuring my questions are specific, I have a dataset and their index:
[1,2,3,4,5,6,7,8,9]
[1,4,8,0,0,1,9,0,3]
Say I would like to find the index and value of the 1st value > 2 after value (8)
Which means my desired output would look like this:
[7]
[9]
Normally, I would have a table of starting indices, but this is just a random sample to keep it short.
How do I code this?
Thanks.

Answers (1)

KALYAN ACHARJYA
KALYAN ACHARJYA on 25 Feb 2021
"I would like to find the index and value of the 1st value > 2 after value (8)"
Is this?
data=[1,4,8,0,0,1,9,0,3]
idx8=find(data==8)
idx=find(diff(data)<0)
result_idx=idx(idx>idx8(1))
Answer would be 7 only, can you verify again?
  2 Comments
Jonathan Cheong
Jonathan Cheong on 25 Feb 2021
The data won't be exactly 0 but it will be less than 2.
Hence the code should stop when the 1st value greater than 2 after the starting index is reached

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by